US3917223A - Slide valve having adjustable packing - Google Patents

Slide valve having adjustable packing Download PDF

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Publication number
US3917223A
US3917223A US27483572A US3917223A US 3917223 A US3917223 A US 3917223A US 27483572 A US27483572 A US 27483572A US 3917223 A US3917223 A US 3917223A
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US
United States
Prior art keywords
slide valve
housing
slide
packing
packing means
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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English (en)
Inventor
Hans Sidler
Stalder
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sistag Maschinenfabrik Sidler Stalder AG
Original Assignee
Sistag Maschinenfabrik Sidler Stalder AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sistag Maschinenfabrik Sidler Stalder AG filed Critical Sistag Maschinenfabrik Sidler Stalder AG
Application granted granted Critical
Publication of US3917223A publication Critical patent/US3917223A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
    • F16K3/0281—Guillotine or blade-type valves, e.g. no passage through the valve member
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/4238—With cleaner, lubrication added to fluid or liquid sealing at valve interface
    • Y10T137/4245—Cleaning or steam sterilizing
    • Y10T137/4273—Mechanical cleaning

Definitions

  • the present invention relates in general to the construction of valves and in particular for a new and useful slide valve having a face which is sealed by a packing with a transversely extending portion which may be adjustably compressed against the valve slide face.
  • the present invention relates particularly to slide valves and to an improved sealing construction for such valves.
  • the known valves are sealed toward the outside of the housing by a sealing material which surrounds the slide member and works in conjunction with the guidance and closure of the slide.
  • the slide valve is guided by a packing material arranged in a U-shaped groove in the housing at a location such that the sealing insert bears against the slide.
  • the known constructions include a cross groove surrounding half the periphery of the slide member which is provided for a packing or insert which bears against the slide member.
  • a disadvantage in the known construction is that it is difficult to maintain and replace the seal. Adjustment or replacement of the seal is only possible after the parts of the slide valve have been dismantled so that the valve must be taken out of service or -at least partially dismantled at the location.
  • the present invention provides a slide valve with a slide member which is movable backwardly and forwardly to open and close a flow passage and which is sealed around its periphery from the outside of the housing by a generally U-shaped packing or seal which also includes a transverse portion.
  • the housing includes an adjustment member which makes it possible to adjust the packing particularly the transverse portion without dismantling any of the parts of the slide valve or without taking the valve out of service.
  • the cross seal portion of the packing includes a hollow bar which is divided centrally to carry an elastomeric material with a cavity in which is arranged a compressible packing.
  • the packing is subjected to the compressive action of threaded members or bolts which project through threaded bores of the housing from respective opposite sides and which may bear against the opposite sides under adjustable pressure.
  • the hollow bar is advantageously provided with grooves of V shaped cross section and the segments of the bar advantageously terminate in a narrow lip along which the two parts of the bar touch.
  • the bars are pressed firmly against the slide member to put the packing under pressure.
  • the packing material is located in the cavity in the bar formed by two V shaped grooves in a construction which prevents extrusion of the packing material through the dividing slit in the hollow bar.
  • the hollow bars which carry the packing material advantageously extend to each side of the slide plate member and in this area they are formed as a segment of a circle with an opening therethrough which is blocked off by a packing insert shaped to conform to the geometry of the hollow bars.
  • the housing of the valve is divided in the plane of the slide plate so that only one part of the housing has to be machined to form a guide channel for the slide plate GENERAL DESCRIPTION OF THE PREFERRED Accordingly it is an object of the invention to provide a slide valve which includes a slide member which is ing the bearing pressure of the sealing member.
  • a further object of the invention is to provide a slide valve construction which is simple in design, rugged in construction and economical to manufacture.
  • FIG. 1 is a front elevational view of a slide valve con- ;struction in accordance with the invention
  • FIG. 2 is an enlarged partial front end perspective view of the slide valve member and the packing seal construction v for the vaive shown in FIG. 1;
  • FIG. 3 is a section taken along the line 3-3 of FIG.
  • the invention 'embodied therein comprises a slide valve having a housing made up of two parts la and lb which are bolted together and which include a' transversely extending opening defining a cylindrical flow passage 2.
  • the slide member in the form of a plate 3 is guided in a guide channel defined in one part of the housing and it is fixed atits top to a drive nut 4 which isthreaded .to a threaded spindle 6 for axial movement therealong upon rotation of a hand wheel 5.
  • the hand wheel 5 is locked against axial displacement and is affixed to the spindle 6 to permit shifting of the nut 4 and the slide valve for opening and closing the flow passage 2.
  • the j plane of division of the housing into the parts 1a and lb is coextensive with one face of the slide plate 3 so that only one part of the housing has to be machined to form the guide channel for the plate.
  • a substantially U shaped sealing groove 7 is provided in the machined part of the housing and it includes lateral portions which open up into a lower portion of each end of a cross groove 8 which extends transversely around one side of the slide plate 3. The groove also continues in the other part of the housing part lb.
  • the cross groove 8 has a substantially rectangular cross section and extends along the broad face of the slide plate and it is semicircular in cross section as shown in FIG. 1 at each end of the plate.
  • a sealing ring 9 made of an elastomeric material is inserted into the groove 7 and in the lower portion of the part of the cross groove 8 which is located in the housing part la.
  • the slide plate which is slightly curved on its bottom edge is formed with relatively sharp corners so that its movement will effect a self cleaning action on the plate because these sharp corners act as scavenging corners from which any material which tends to stick to the plate is scoured by the flow in the passage of the slide valve.
  • the shape of the lower edge of the slide plate squeezes out the flow medium in the lower part of the U shaped section seal 9 by a guillotine-like action.
  • scraper members 10 On the inner or flow side of the wall of the cross groove 8 are located scraper members 10 which are pressed against the side faces of the slide plate 3 by an elastomeric ring 11.
  • the scraper members 10 prevent particles from the flow medium from sticking to the plate 3 and prevent the penetration of the particles into the cross seal when the slide valve is open.
  • this cross seal On each side of the plate 3 this cross seal has a two part hollow bar including a part 12a on one side and a part 12b spaced laterally on the other side and each being made of an elastomeric material.
  • the parts or segments of the hollow bar 12a and 12b which presents a V shaped groove in cross section rest on one another along their lips are adjacent to the grooves and which end in a narrow face so that a diamond shaped cavity is formed into which is inserted a plastic compressible packing material 13.
  • This packing material 13 may comprise for example a paste or mastic formed by asbestos fibers. The compressibility of the paste or mastic arises from the permanently existing air pockets therein.
  • the plastic packing material 13 is advantageously formed in diamond shaped strips which may be introduced into the cavity in the hollow bar on the initial insertion thereof or when replenishing becomes necessary by means of a suitable tamper.
  • the hollow bars 120 and 12! include inner lip portions which press against the slide plate and the partially circular ends of the bars project beyond the plate into the narrow sided portions of the cross groove 8.
  • the free space between these projecting portions of the upper parts of the hollow bars 12a at the narrow edge contains a partly circular sealing insert 14 and a seal which completely surrounds the slide plate is formed by the parts 12a and 14.
  • the cavities of the hollow bars 12a and 12b which are filled with the packing material 13 are lined with threaded holes 15 which are provided in the housing parts la and 1b on each side thereof.
  • Adjustment bolts or threaded members 17 are engaged through the threaded bores 15 and they apply a pressure to the packing substance 13 through interposed sealing pads 16.
  • the threaded bolts 17 are threaded in a tightening direction against the sealing pads to compress the packing substance 13 so that the lips of the hollow bars 12a and 12b which are disposed against the slide plate are pressed against the plate to form a tight seal.
  • This contact pressure also prevents packing material 13 from emerging from the cavity in the bars 12a and 1211 so that there is no danger that it will escape toward the inside or outside along the face of the plate.
  • the slide valve is of very simple construction and it guarantees not only integrity sealing of the slide plate but also a seal which can be adjusted at any time even when the full operational pressure prevails in the pressure of the slide valve.
  • the adjusting may be made by simple adjusting the positon of the adjustment bolt 17.
  • a slide valve comprising a valve housing having a transverse opening defining a flow passage, a slide valve inset housing movable back and forth to open and close said flow passage, a compressible packing means bearing at least against one face of said slide, and an adjustment member extending into said housing and bearing against said packing means and being adjustable to move said packing means to apply a predetermined pressure against said slide, said packing means includyond each end of said slide valve, said valve comprising a flat plate, said hollow bars having a semicircular portion at each end, a similarly partly circular insert arranged between said bar semicircular end portions.
  • a slide valve according to claim 2 and including a U shaped sealing ring arranged in said transversely extending annular groove.
  • a slide valve according to claim-3 wherein said slide valve comprises a flat plate having a curved bottom edge with sharp corners forming scavenging corners.
  • a slide valve comprising a valve housing formed of two interengageable relatively flat parts having a transverse opening extending therethrough defining a flow passage, a slide valve arranged for vertical up and posed in said transversely extending portion of said groove, said packing means including a hollow elastic material bar, and a segmental compressible material in said bar, and an adjustment member mounted on said housing and engageable with the compressible material for varying the sealing force of said packing material against said slide valve.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sliding Valves (AREA)
US27483572 1972-01-05 1972-07-24 Slide valve having adjustable packing Expired - Lifetime US3917223A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH10672A CH541756A (de) 1972-01-05 1972-01-05 Schieber

Publications (1)

Publication Number Publication Date
US3917223A true US3917223A (en) 1975-11-04

Family

ID=4179403

Family Applications (1)

Application Number Title Priority Date Filing Date
US27483572 Expired - Lifetime US3917223A (en) 1972-01-05 1972-07-24 Slide valve having adjustable packing

Country Status (9)

Country Link
US (1) US3917223A (it)
AT (1) AT335810B (it)
AU (1) AU4667572A (it)
BE (1) BE784749A (it)
CA (1) CA977732A (it)
CH (1) CH541756A (it)
FR (1) FR2166856A5 (it)
GB (1) GB1392349A (it)
IT (1) IT968219B (it)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4111394A (en) * 1977-02-18 1978-09-05 Andreas Jaudt Adjusting device for the gland packing of a flat slide-valve
US4138126A (en) * 1977-10-19 1979-02-06 Andreas Jaudt Adjustable packing assembly
US4646777A (en) * 1984-12-19 1987-03-03 Sistag Maschinenfabrik Sidler Stalder Ag Flat slide valve with notched guide strips
AT390656B (de) * 1981-10-29 1990-06-11 Sistag Flachschieber
US5064167A (en) * 1990-10-31 1991-11-12 Fike Corporation Adjustable packing assembly for valve stem
US5078175A (en) * 1989-02-16 1992-01-07 Kent Intral Limited Valve
US6663079B1 (en) 2002-07-18 2003-12-16 Mcwane, Inc. Resilient seat gate valve
US20050218368A1 (en) * 2004-04-01 2005-10-06 Vanderberg Christopher A Knife gate valve having elastomeric gate and chest seals
US20060255305A1 (en) * 2005-05-13 2006-11-16 Comstock John P Knife gate valve with multi-piece elastomer liner and/or o-rings at flange interface
US20100224815A1 (en) * 2009-02-05 2010-09-09 Sistag Ag Absperrtechnik Slide Valve, In Particular for Blocking a Line Conveying Media
US20100276111A1 (en) * 2007-07-27 2010-11-04 Franz Kawa Process for Producing Steel Long Products by Continuous Casting and Rolling
US20110001076A1 (en) * 2009-07-02 2011-01-06 Sistag Ag Absperrtechnik Slide Valve, in Particular for Blocking a Line Conveying Media
US20110049409A1 (en) * 2009-04-02 2011-03-03 Sistag Ag Absperrtechnik Slide Valve, In Particular for Blocking a Line Conveying Media
US9140368B2 (en) 2013-03-15 2015-09-22 Mueller International, Llc Gate valve with track cleanout
US10969020B2 (en) 2016-04-07 2021-04-06 Australian Rubber Products Pty Ltd Gate valve with valve body liner
US11300213B1 (en) 2021-02-19 2022-04-12 Emerson Automation Solutions Final Control US LP Floating yoke connection
US11499644B2 (en) 2020-08-25 2022-11-15 Emerson Automation Solutions Final Control US LP Sealing assembly for a knife gate valve
US12123513B2 (en) * 2020-10-27 2024-10-22 Itt Manufacturing Enterprises, Llc Perimeter seated knife gate valve

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2658809C3 (de) * 1976-12-24 1980-02-07 Sistag, Maschinenfabrik Sidler Stalder Ag, Eschenbach, Luzern (Schweiz) Flachschieber
DE3442846A1 (de) * 1984-11-23 1986-06-05 Siemens AG, 1000 Berlin und 8000 München Ventilsteuereinrichtung fuer ein zahnaerztliches geraet

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2842283A (en) * 1956-02-20 1958-07-08 Wm Powell Company Closure for pressure vessels
US3722896A (en) * 1971-03-19 1973-03-27 Crane Packing Co Secondary seal for rotary mechanical seal
US3829862A (en) * 1973-04-20 1974-08-13 D Young Ridge scan antenna

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2842283A (en) * 1956-02-20 1958-07-08 Wm Powell Company Closure for pressure vessels
US3722896A (en) * 1971-03-19 1973-03-27 Crane Packing Co Secondary seal for rotary mechanical seal
US3829862A (en) * 1973-04-20 1974-08-13 D Young Ridge scan antenna

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4111394A (en) * 1977-02-18 1978-09-05 Andreas Jaudt Adjusting device for the gland packing of a flat slide-valve
US4138126A (en) * 1977-10-19 1979-02-06 Andreas Jaudt Adjustable packing assembly
AT390656B (de) * 1981-10-29 1990-06-11 Sistag Flachschieber
US4646777A (en) * 1984-12-19 1987-03-03 Sistag Maschinenfabrik Sidler Stalder Ag Flat slide valve with notched guide strips
US5078175A (en) * 1989-02-16 1992-01-07 Kent Intral Limited Valve
US5064167A (en) * 1990-10-31 1991-11-12 Fike Corporation Adjustable packing assembly for valve stem
US6663079B1 (en) 2002-07-18 2003-12-16 Mcwane, Inc. Resilient seat gate valve
WO2004010034A1 (en) * 2002-07-18 2004-01-29 Mcwane, Inc. Resilient seat gate valve
GB2395542A (en) * 2002-07-18 2004-05-26 Mcwane Inc Resilient seat gate valve
GB2395542B (en) * 2002-07-18 2005-10-19 Mcwane Inc Resilient seat gate valve
US20050218368A1 (en) * 2004-04-01 2005-10-06 Vanderberg Christopher A Knife gate valve having elastomeric gate and chest seals
WO2005098288A1 (en) * 2004-04-01 2005-10-20 Itt Manufacturing Enterprises, Inc Knife gate valve having elastomeric seals
US7059586B2 (en) 2004-04-01 2006-06-13 Itt Manufacturing Enterprises, Inc. Knife gate valve having elastomeric gate and chest seals
US7350766B2 (en) 2005-05-13 2008-04-01 John Paul Comstock Knife gate valve with multi-piece elastomer liner and/or o-rings at flange interface
US20060255305A1 (en) * 2005-05-13 2006-11-16 Comstock John P Knife gate valve with multi-piece elastomer liner and/or o-rings at flange interface
US20100276111A1 (en) * 2007-07-27 2010-11-04 Franz Kawa Process for Producing Steel Long Products by Continuous Casting and Rolling
US8327870B2 (en) * 2009-02-05 2012-12-11 Sistag Ag Absperrtechnik Slide valve with slider plate sealing mechanism
US20100224815A1 (en) * 2009-02-05 2010-09-09 Sistag Ag Absperrtechnik Slide Valve, In Particular for Blocking a Line Conveying Media
US20110049409A1 (en) * 2009-04-02 2011-03-03 Sistag Ag Absperrtechnik Slide Valve, In Particular for Blocking a Line Conveying Media
US8235355B2 (en) 2009-04-02 2012-08-07 Sistag Ag Absperrtechnik Slide valve, in particular for blocking a line conveying media
US20110001076A1 (en) * 2009-07-02 2011-01-06 Sistag Ag Absperrtechnik Slide Valve, in Particular for Blocking a Line Conveying Media
US8365760B2 (en) * 2009-07-02 2013-02-05 Sistag Ag Absperrtechnik Slide valve with temperature barrier
US9140368B2 (en) 2013-03-15 2015-09-22 Mueller International, Llc Gate valve with track cleanout
US9604260B2 (en) 2013-03-15 2017-03-28 Mueller International, Llc Gate valve with track cleanout
US10969020B2 (en) 2016-04-07 2021-04-06 Australian Rubber Products Pty Ltd Gate valve with valve body liner
US11499644B2 (en) 2020-08-25 2022-11-15 Emerson Automation Solutions Final Control US LP Sealing assembly for a knife gate valve
US12123513B2 (en) * 2020-10-27 2024-10-22 Itt Manufacturing Enterprises, Llc Perimeter seated knife gate valve
US11300213B1 (en) 2021-02-19 2022-04-12 Emerson Automation Solutions Final Control US LP Floating yoke connection
US11603938B2 (en) 2021-02-19 2023-03-14 Emerson Automation Solutions Final Control US LP Floating yoke connection

Also Published As

Publication number Publication date
GB1392349A (en) 1975-04-30
AU4667572A (en) 1974-03-21
ATA518172A (de) 1976-07-15
IT968219B (it) 1974-03-20
BE784749A (fr) 1972-10-02
CA977732A (en) 1975-11-11
FR2166856A5 (it) 1973-08-17
AT335810B (de) 1977-04-12
CH541756A (de) 1973-09-15

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